Which cellular organelle is responsible for adenosine triphosphate (ATP) production?
Endoplasmic reticulum
Lysosome
Mitochondria
Ribosome
The Correct Answer is C
A. The endoplasmic reticulum (ER) is involved in the synthesis of proteins and lipids, but it is not responsible for ATP production.
B. Lysosomes are responsible for breaking down waste materials and cellular debris, but they do not play a role in ATP production.
C. Mitochondria are the powerhouses of the cell, where ATP is produced through cellular respiration. They convert nutrients into energy, making them the primary site for ATP production.
D. Ribosomes are responsible for protein synthesis, not ATP production. They are found in the cytoplasm and on the rough endoplasmic reticulum.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Vasodilation refers to the widening of blood vessels, which typically lowers blood pressure by decreasing the resistance within the vessels.
B. Increased cardiac output means the heart pumps more blood per minute, which raises blood pressure by increasing the volume of blood circulating through the arteries. This is the correct answer.
C. Decreased heart rate would typically lower blood pressure, as the heart is pumping less frequently, reducing the force exerted on the blood vessels.
D. Parasympathetic stimulation generally lowers blood pressure as it promotes relaxation and reduces the heart rate, which in turn reduces cardiac output.
Correct Answer is A
Explanation
A. Intrinsic factor is a glycoprotein produced by the stomach that binds to vitamin B12 and facilitates its absorption in the small intestine, particularly in the ileum. This is the correct answer.
B. Bile salts are involved in the digestion and absorption of fats, not vitamin B12.
C. Pepsin is an enzyme in the stomach that aids in the digestion of proteins but is not involved in vitamin B12 absorption.
D. Amylase is an enzyme that helps break down carbohydrates, not involved in the absorption of vitamin B12.
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